(19)

(11)

EP 4 281 981 A1

(12)

(43) Date of publication: 29.11.2023 Bulletin 2023/48 (21) Application number: 22700673.1 (22) Date of filing: 17.01.2022

(51) International Patent Classification (IPC):  G21C 1/07(2006.01) G21C 3/04(2006.01) G21C 1/12(2006.01) (52) Cooperative Patent Classification (CPC): G21C 1/07; G21C 1/12; G21C 3/042; G21C 5/126; G21C 5/02; Y02E 30/30 (86) International application number: PCT/GB2022/050086 (87) International publication number: WO 2022/157484 (28.07.2022 Gazette 2022/30)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 25.01.2021 GB 202100949 (71) Applicant: BAE SYSTEMS plc London SW1Y 5AD (GB)	(72) Inventor: OWSTON, Jeremy Henry Cumbria LA14 1AF (GB) (74) Representative: BAE SYSTEMS plc Group IP Department  Warwick House P.O. Box 87 Farnborough Aerospace Centre Farnborough Hampshire GU14 6YU Farnborough Hampshire GU14 6YU (GB)